Strom



(No Model.) 2 Sheets Sheet 1.

O. J. BERGSTRUM. DRY HOUSE FOR LUMBER, &c,

No. 603,837. Patented May 10,1898.

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WITNESSES: INVENTOR XZ/WW QQJ 3 6W ATTO R N EY THE NoRms PETERS c0.vuurauwon \vnmmmm u. c

(No Model.) n 2 SheetsSheet 2.

C, J. BERGSTROM.

DRY HOUSE FOR LUMBER, &c. No. 603,837. Patented May 10,1898.

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J/ ATTORNEY NI'IED STATES CARL JOI-IAN BERGSTRGM, OF FINSHYTTAN, SWEDEN.

DRY-HOUSE FOR LUMBER &.c.

SPECIFICATION formingpart of Letters Patent N 0. 603,837, dated May 10,1898.

Application filed August 1 8, l 8 9 '7.

' is a specification, reference being had therein to the accompanyingdrawings.

The present invention relates to some improvements in such dry-houses asconsist of several drying-rooms that can be placed in ducted through thedrying-rooms.

communication with one another, as well as with a room containing aheating apparatus, the heating-room,whence the air is conducted into thedrying-rooms, and with a room containing a condenser arrangement, intowhich room the moist air from the drying-rooms is introduced and fromwhich said air, after the moisture contained in it has been condensedand removed, is introduced into the heatingroom to be subsequentlyreturned to and con- The air is conducted from the top downward througheach drying-room and, if desired, from one room to an adjoining one. Insuch dry-houses the drying-rooms are arranged in a circle around acentral room, and the corners at the periphery of the rooms beingunsuited for the piling of lumber are cut off by means of walls, soas toform triangular chambers between the dryingrooms, which chambers serveas passages of communication between adjoining drying-rooms. Adisadvantage of this arrangement is that the air in its course throughthe passages mentioned, which become excessively large, loses much ofits heat and that as a result the eiiiciency of the dryhouse is reduced.For conducting the air from the drying-rooms to the condenser-room,which adjoins the heating-room, the latter is surrounded by or there isarranged underneath it a passage connecting with the condenser-room andcommunicating with the drying-rooms by means of apertures that can beclosed up.

The object of the present invention is to increase the efficiency of thedry-house above referred to and to simplify its construction.

Figure 1 represents a longitudinal vertical section of a dry-housearranged inaccordance with this invention. Figs. 2 and 3 show, re--$erial No. 648,621. (No model.)

spectively, a horizontal and a transverse section of the dry-house.

The drying-rooms I II III accordingto this invention are arranged eachside of an oblong central room B and can be placed in communication withthe latter by means of adjustable openings d. The condenser-room A liesunderneath the central room B, and consequently the drying-rooms I IIIII can be placed in direct communication with it (the condenser-room)without the aid of passages by means of adjustable apertures e in thewall between the drying-rooms and the condenser-room. The apparatus 0for heating the air is located at one end of the room lB the hot-airpassage. The air of the condenserroom is, as usual, driven through theheating apparatus by means of a fan 0. In order to allow of conductingthe air from one dryingroom-I, for instanceto the adjoining room II, anadjustable opening f is made, as usual, at the lower part of thepartition between said rooms. In order to conduct the air to the upperportion of the room '11, all that is re quired according to thisinvention is to arrange inlthe latter room, near the partitionmentioned, a screen or wall g, which does not reach clear up to theceiling of said room.

Such a screen or wall g is located at each par tition between twoadjoining drying-rooms. For the conduction of the air from one of therooms at the ends of the central room to the other, passages K K areprovided. The passages K K and K K between the partitions and thescreens g may be made very narrow, with a view to making theirbounding-wall at the outside of the dry-house very small, the result ofwhich is that the radiation of heat through said wall will be verysmall. The

air, therefore, in flowing from one room to an adjoining one willretainnearly all its heat, and the efficiency of the dry-house is therebymaterially increased. The lumber is introduced in the drying-roomsthrough doors h, for instance, and is placed on horses.

Thedrying or seasoning operation is carried on in the same manner as inthe older dlryhouses. The air may either be conducted directly from theroom 13 into each of the drying-rooms and then out to the condenserroomA or it may be led into one of the drying-rooms, then through one ormore of, the

denser.

adjoining rooms, and finally to the condenserroom. The condensation maybe accomplished by means of water issuing from sprinkler-pipes or bymeans of a surface con- In order to prevent the air from passing fromthe drying-rooms adjoining the heating apparatus 0 directly to the fan0, a screen i, of corrugated iron or equally-serviceable material, isprovided, which causes the air to flow under the sprinkler-pipes.

By locating the condenser -room underneath the room B it is possible tolead the air directly from the drying-rooms to the condenser-roomwithout the aid of interposed passages, as used in the dry-houses ofthis kind previously employed. By arranging the rooms A and B asdescribed above and by grouping the drying-rooms each side of them thedry-house is materially simplified, and consequently it Will be cheaperto construct than those heretofore used. The latter arrangement alsoallows of adding more rooms to the dry-house, when desired, by buildingon an addition or of reducing the number of drying-rooms of a dry-housewhen necessary, this not being possible in dry-houses having theirdrying-rooms arranged in a circle.

Having now described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A dry-house for lumber and the like, having a hot-air passage or room13 and drying-rooms arranged at the sides of said passage with means ofcommunication between said rooms and between each of them and saidpassage, and having also a condensing-room A for the moisture in the aircoming from the drying-rooms, said condensing-room being situatedalongside of the several dryingrooms and having controllablecommunication therewith, whereby the condensing-room may be put indirect communication with the several drying-rooms, substantially as setforth.

2. A dry-house for lumber and the like comprising two series ofdrying-rooms situated at opposite sides of and abutting on a centralspace which is divided by a floor forming a hot-air passage B, above,and a condensing-room A, below, apertures d, connecting the passage Bwith each of the dryingrooms, apertures 6 connecting the room A witheach of the drying-rooms, means for closing said apertures at will, aheater 0, in the passage between the drying-rooms, means for causing acirculation of the air in the dryhouse and means for condensing themoisture in the air, substantially as set forth.

3. A dry-house having a plurality of dryin g-rooms arranged side by sideand separated by partitions each having an opening f near its bottom forthe passage of air and a partition-screen g nearsaid partition, whichscreen extends from the floor up partway to the ceiling of the room,whereby a flue orconduit is formed for the air coming in from the bottomof one room, said air being thus compelled to rise through said flue andflow over into the upper part of the adjacent room, substantially as setfort-h.

In Witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

CARL JOHAN BERGSTRGM.

Witnesses:

E. HERMANSSON, H. B. OHLSSON.

